Analysis Cost 231 MultiWall Model on 4G LTE FDD 1800 and ...

JAICT, Journal of Applied Information and Communication Technologies Vol.1, No.1, 2016

Analysis Cost 231 MultiWall Model on 4G LTE FDD 1800 and 900 Mhz Femtocell Network Planning

Alfin Hikmaturokhman1 , Solichah Larasati2, Eka Setia Nugraha3 123Sekolah Tinggi Teknologi Telematika Telkom Purwokerto

Abstrak -Indoor cellular network system is one solution to overcome weak signals transmited by eNodeB. Building with high cellular communication traffic levels , requiring indoor network system to maintain continuity of communication by all users. Therefore, it is necessary to plan an indoor network using Femtocell Access Point (FAP). This research is based on network design indoor propagation COST 231-Multiwall Model using the software Radiowave Propagation Simulator (RPS) and conducted at Telkom Office. The collection of data obtained is used to perform calculations on research variables include the calculation of capacity and coverage. The research showed the number of FAP for capacity and coverage is 3 FAP. The Coverage Results for scenario 2 is the best result compared with the other scenarios, with the following results, the frequency of 1800 MHz at Building 1 of -19.86 dBm, Building 2 at -21.34 dBm, and Building 3 at -28, 07 dBm. While the scenario 2 for the 900 MHz frequency in Building 1 at -13.38 dBm, Building 2 at -14.52 dBm, and building 3 of -20.39 dBm Index Terms— :Femtocell, RPS, COST 231Multiwall,4G LTE,FDD

I. Introduction

Requirement for data and voice communication is very necessary, not only outdoor users , but also necessary for indoor users eg offices, schools, shopping centers, etc.Indoor Building Coverage is a system with a transmitter and receiver are installed in the building.

LTE is a technology development of GSM (Global System for Mobile Communications) and UMTS (Universal Mobile Telecommunication System) with a speed higher datarate.

LTE Femtocell technology can improve indoors signal coverage because of the placement of femtocell base station placed in the room. The signal quality indoors is better because of the reduced distance between FAP (Femtocell Access Point) with the user. Based on this background, the authors took the research on the topic “Analysis Cost 231 MultiWall Model on 4G LTE FDD 1800 and 900 Mhz Femtocell Network Planning”.

II. Basic Theory

A. Mobile Communication System [1] Mobile communication system is a wireless

telecommunications system that delivers good mobility to the user. The service area is divided

into small areas called cells.

Fig 1. Cellular Communication System Architecture [1]

B. LTE (Long Term Evolution)[3] LTE (Long Term Evolution) is the

development of third generation technology (3G) WCDMA-UMTS from the 3rd Generation Partnership Project (3GPP).

Fig 2. LTEArchitecture[1]

C. Indoor Building Solution (IBS) Indoor Building Solution is a solution to

overcome the problem of weak signal in the room or building, expanding the coverage area of the cell, and overcome high customer inside the building.[5]

D. Femtocell


Femtocell is a micro base stationstechnology that use low power level as a solution for customers who are in the room or building.

Fig 3. Femtocell Concept [5]

Femtocell architecture consists of three main things: a. Femtocell Access Point (FAP) is a major node in the network-based femtocell. b. Security Gateway (SeGW) is a network node that acts to secure the Internet connection between the femtocell users on the service provider's core network. c. Femtocell Device Management System (FMS) is the part that ensures scalability femtocell network to multiple devices.

E. Indoor Propagation Network Indoor network propagation model are: a. One Slope Model is a model that takes into

account propagation parameters that affect the calculation of pathloss exponent.

b. Keenan Motley indoor propagation model is a model that takes into account the entire wall in the vertical plane between the transmitter and receiver.

c. Cost 231 Multi-Wall Model is a propagation model where all the walls in the vertical plane and properties of materials between transmitter and receiver included in the calculation

LT=LFSL+LC 𝒏𝒘𝒊. 𝑳𝒘𝒊𝒏𝒇[𝒏𝒇!𝟐𝒏𝒇!𝟏!𝐛]

𝑴

𝒊!𝟏

𝑳𝒇 (1)[9]]

Information : LFLS = free space loss Lfsl = 20 + 10 log fMhz 20 10 log d (km) +32.5 LC = constant loss = 37 dB NWI = the value of the type penetrated wall (partition wall material) LWI = wall type of loss LW1 = L Light Wall Lw2 = L Heavy Wall Lf = loss between floors adjacent to each other. b = empirical parameter (0.46) M = Number of wall type : LFLS= free space loss LFSL = 20 10 log fMhz + 20 10 log d(km)+32,5 LC = constant loss = 37 dB nwi= partition wall materials Lwi= wall type loss

Lw1 = L Light Wall Lw2 = L Heavy Wall Lf = loss between floors adjacent to each other. b = empirical parameter (0,46) M = Number of wall type nf = value frompenetrated floors

G. Link Budget Calculation a. Propagation Line of Sight (LOS) is a power drop

during the radio waves propagating in free space.. FSL = 32,45 + 20 log f (MHz) + 20 log d(km) (2)[3]

b. Effective Isotropic Radiated Power (EIRP). EIRP = Ptx + Gtx – Ltx (3)[3]

c. Receive Signal Level (RSL) RSL: received signal level at the receiver side.

RSL = EIRP – Lpropagasi + GRX – LRX(4)[1]

d. SensitivitasReceiver (SR) 𝑺𝑹 = 𝒌𝑻𝑩 + 𝑵𝑭 + 𝑺𝑵𝑹 + 𝑰𝑴(5)[1]

H. Determining the Number of FAP 1. Based on Capacity,

a. Calculating Future Population

Future Population = 𝑷𝟎[𝟏 + 𝑮𝑭)]𝒏(6)[9]

b. Calculating Throughput

Throughput = Bearer rate x Session time x Session duty ratio x [1/(1-BLER)] (7)[9]

c. Calculating Single User Throughput

Single User Throuhput = [ 𝑻𝒉𝒓𝒐𝒖𝒈𝒉𝒑𝒖𝒕

𝑺𝒆𝒔𝒔𝒊𝒐𝒏 𝒙 𝑩𝑯𝑺𝑨 𝒙 𝑷𝒆𝒏𝒆𝒕𝒓𝒂𝒕𝒊𝒐𝒏 𝑹𝒂𝒕𝒊𝒐 𝒙 (𝟏!𝑷𝑨𝑹)]

𝟑𝟔𝟎𝟎 (8)[9]

d. Uplink Network Throughtput (IP)

Uplink Network Throughput (IP) = Total User Number x UL Single Throughput (9)[9]

Information :

e. Downlink Network Throughtput (IP)

Downlink Network Throughput (IP) = Total User Number x DL Single User Throughput (10)[9]

f. Total FAP FAP Amount = 𝑼𝒔𝒆𝒓 𝑨𝒎𝒐𝒖𝒏𝒕

𝐍𝐮𝐦𝐛𝐞𝐫 𝐨𝐟 𝐔𝐬𝐞𝐫𝐬 𝐩𝐞𝐫 𝐜𝐞𝐥𝐥 (11)[9]

2. Based on Coverage a. COST 231 Multiwall Model


LT = LFSL+ 𝐋𝐂 𝒏𝒘𝒊. 𝑳𝒘𝒊 + 𝒏𝒇[𝒏𝒇!𝟐𝒏𝒇!𝟏

!𝐛]𝑴

𝒊!𝟏

𝑳𝒇(12)[9]

b. The covered area 𝑳 = 𝟐,𝟔 𝒅𝟐 (13)[9]

c. Jumlah Femtocell FAP Amount = (𝑻𝒉𝒆 𝒂𝒓𝒆𝒂 𝒄𝒐𝒗𝒆𝒓𝒆𝒅)

(𝒂𝒓𝒆𝒂 𝒐𝒇 𝒄𝒆𝒍𝒍 𝒄𝒐𝒗𝒆𝒓𝒂𝒈𝒆) (14)[9]

II. RESEARCH METHODOLOGY A. Research Instruments The research instrument required is a laptop that already installed Radiowave Propagation Simulator (RPS), a site plan of research, and the type of building materials. B. Research Methods The research methodology used was simulated. By creating a design that uses Radiowave Propagation Simulator version 5.4. C. Data Collection Collecting data in this research is to design and data preparation design results.Data preparation for designing the required data before you can design the indoor LTE network. Sample data is as follows building that will be analyzed, indoor base stations, and partition materials.The data is a result of design data associated with the design form of the calculation result. The data obtained through testing by using a calculation formula.

D. Planning Area Description Planning area carried at Telkom Office located at Jalan Pemuda No. 74, a total area of 508.15 meter2 with a height of 3.5 meters from the ground which is divided into 3 separate buildings, namely plasa telecoms with an area of 85.62 meter2, DCS building with an area of 85.93 meter2, and building division access to the building area of 189.62 meter2

II. DESIGN ANALYSIS AND SIMULATION RESULTS A. RESULTS CALCULATION

A. The following describes the calculation of the indoor network planning.

1. Link Budget Table 2. MAPL UplinkCalculation

Transmitter Value Calculation

A Max TX Power (dBm) 23

B TX Antena Gain (dBi) 0

C Body Loss (dB) 0

D EIRP (dBm) 23 d=a+b-c

Receiver Value Calculation

E Noise Fig (dB) 2

F Thermal Noise (dBm) -137.445 KTB

G Receiver Noise Floor (dBm) -135.445 g=e+f

H SINR (dB) -7

I Receiver Sensitivity (dBm) -142.445 i=g+h

J Load Factor 0.7 70%

K Interference Margin (dB) 1

L Cable Loss (dB) 0

M RX Antena Gain (dBi) 0

N Fast Fade Margin (dB) 0

O Maximum Path Loss 157.445 o=d-g-k+m-n

Table 3. MAPL Downlink Calculation Transmitter Value Calculation

A Max TX Power (dBm) 34

B TX Antena Gain (dBi) 0

C Cable Loss (dB) 2

D EIRP (dBm) 32 d=a+b-c

Receiver Value Calculation

E UE Noise Fig (dB) 7

F Thermal Noise (dBm) -137.445 KTB

G Receiver Noise Floor (dBm) -130.445 g=e+f

H SINR (dB) -9

I Receiver Sensitivity (dBm) -139.445 i=g+h

J Load Factor 0.7

K Interference Margin (dB) 4

L Control Channel overhead (%) 0.1 10%

M RX Antena Gain (dBi) 0

N Body Loss (dB) 0

O Maximum Path Loss 158,445 o=d-g-k+m-n

Uplink MAPL Calculation acquired 157.445 dB and downlink MAPL calculations obtained 158.445 dB.

2. Indoor Attenuation Indoor loss calculation is done to get how big

a result of loss of material such as the type of walls, floors, insulation, glass, etc.


Table 4. Building 1 ObstacleTotal Loss

Obstacle Type dB Amount Total (dB)

Glass 0.8 9 7.2

Concrete 4 6 24

Wood Door 4 1 4

ObstacleTotal Loss 35.2 Table 5. Building 2 Obstacle Total Loss

Obstacle Type dB Amount Total (dB)

Glass 0.8 8 6.4

Concrete 4 6 24

Wood Door 4 2 8

Obstacle Total Loss 38.4

Table 6. Building 3 Obstacle Total Loss Obstacle Type dB Amount Total

(dB)

Glass 0.8 8 6.4

Concrete 4 10 40

Wood Door 4 4 16

Obstacle Total Loss 62.4

After getting the total value of the indoor attenuation of each building, then take into account the propagation permitted after passing loss. Table 7. Propagation losses in Building 1

A Max Path Loss (dB) 158.445.104

B Soft Handoff Gain 0

C Obstacle Total Loss 35.2

D Allowed Propagation Loss for cell range (dB) / LT 123,245104

Table 8. Propagation losses in Building 2

A Max Path Loss (dB) 158.445

B Soft Handoff Gain 0

C Obstacle Total Loss 38.4

D Allowed Propagation Loss for cell range (dB) / LT 120,045104

Table 9. Propagation losses in Building 3

a Max Path Loss (dB) 158.445

b Soft Handoff Gain 0

c ObstacleTotal Loss 62.4

d Allowed Propagation Loss for cell range (dB) / LT 96,045

B. ANALYSIS OF TOTAL FEMTOCELL ACCESS POINT (FAP)

1. Coverage Based Analysis

Coverage based analysis is carried out to determine the area that can be covered by FAP. Table 10. Number of FAP Coverage Based on 1800 MHz

1800 MHz

Building 1 Building 2 Building 3

The area planned 85,62 m2 81,96 m2 189,62 m2

Coverage Cells 189540 m2 91092 m2 362,647 m2

FAP Number 1 1 1

Table 11. Number of FAP Coverage Based on 900 MHz

900 MHz

Building 1 Building 2 Building 3

The area planned 85,62 m2 81,96 m2 189,62 m2

Coverage Cells 758160 m2 364320,6 m2 1450,38 m2

FAP Number 1 1 1

2. Capacity Based Analysis Capacity based analysis used to estimate the number of users that can be served by a single cell..

Table 12. Number of FAP Capacity Based

Item UL DL

Area 508,15 m2

User 50

Network Throughput (Mbps) 2,400182 20,92775

Site Capacity (Mbps) 10,10878 8,423976

FAP Number 1 3

FAP User Number 50 16,66667

C. RADIOWAVE PROPAGATION

SIMULATOR ANALYSIS 1. Building 1

a. FAP is placed on the left side of the room

Fig 16. FAP display Simulation


Fig 17. Composite Coverage Result

b. FAP is placed in the middle of the room



c. FAP is placed on the right side of the

room



2. Building 2 a. FAP is placed on the left side of the room






c. FAP is placed on the right side of the

room




3. Building 3

a. FAP is placed on the left side of the room






a. FAP diletakkan di sisi kanan ruangan



FAP placement of the whole scenario

already have an indicator of average power levels below -70 dBm. However, the most appropriate to be implemented is scenario 2, the beam has the smallest attenuation compared to scenario 1 and scenario 3. D. PHYSICAL CELL IDENTITY (PCI) ALLOCATION

PCI is naming that is used to identify cells in LTE. Number of PCI on LTE at 504 units consisting of 168 (Secondary Synchronization Signal (SSS) ID group and 3 Primary Syncronizatiom Signal (PSS) ID per group. PCI allocation in this research are 492-501 (located at 164-167 SSS). While the rest of the PCI numbering used for macro cell.

Table 13. PCI Allocation

FAP Number PCI Number 1 492 2 495 3 498

III. CONCLUSIONS AND RECOMMENDATIONS

A. Conclusion Based on the research results, it can be concluded that:

1. Maximum Allowable Path Loss is 157.445 dB for uplink and 158.445 dB for downlink

2. The second scenario is selected in this reserach. The second scenario resulting composite value coverage for the 1800 MHz frequency in Building 1 at -19.86 dBm, in Building 2 at -21.34 dBm, and at


Building 3 of -28.07 dBm.While the value of the second scenario composite coverage for the 900 MHz frequency in Building 1 at -13.38 dBm, in Building 2 at -14.52 dBm, and the Building 3 at -20.39 dBm.

3. The allocation of numbering PCI is 3 PCI ie 492, 495, and 498. This corresponds to the number of FAP because there is no division of sectors in each FAP.

B. Recomendations 1. Not only use the 1800 MHz and 900 MHz

but also 2300 Mhz or 850 Mhz. Bandwidth variation not only uses 5 MHz.

2. Selection of partition and building materials more varied so that the simulation results will design more in line with real conditions.

References

[1] Hikmaturokhman, Alfin, Wahyu Pamungkas, Lita Berlianti. 2015. Analisa Model Propagasi Cost 231 Multiwall pada Perancangan Jaringan Indoor Femtocell HSDPA menggunakan Radiowave Propagation Simulator: SNATI Teknik Informatika UII

[2] Hikmaturokhman, Alfin, Lingga Wardana. 4G Handbook Edisi Bahasa Indonesia Jilid 2. .Jakarta: Penerbit nulis buku. 2015

[3] Hikmaturokhman, Alfin, Lingga Wardana. 4G Handbook Edisi Bahasa Indonesia. .Jakarta: Penerbit nulis buku. 2014

[4] Utomo. Budi, Imam Santoso, dan Ajub Ajulian Z, Simulasi Li4nk Budget Pada Sel Femto Teknologi Telekomunikasi LTE ( Long Term Evolution ). Semarang: Universitas Diponegoro, 2010.

[5] Rizky, Ahmad Khoirul. 2014. Analisis Perancangan Coverage Area UMTS Femtocell Pada Apartemen Buah Batu Dengan Alokasi Scrambing Code: Telkom University. Bandung

[6] M. H. Triaoktora and Uke Kurniawan Usman, Analisa Perencanaan Jaringan Long Term Evolution Indoor Di Stasiun Gambir. Bandung : Telkom University, pp. 1–8

[7] D. J. V. Dr.J.Deibner , J.Hubner , D.Hunoid, Radiowave Propagation Simulator User Manual-Version 5.3. Germany: Radioplan GmbH.

[8] Hikmaturokhman, Alfin, Ariza Zati Indria. (2013). Pengaruh Modulasi Adaptif Coding Untuk Perencanaan Coverage Femtocell Di AKATEL Purwokerto. Seminar Nasional Teknologi dan Teknopreneur UNSIQ.

[9] Mobile Com Laboratory. Modul Femtocell Planning for LTE Network “Overview of LTE”. Bandung : Institut Teknologi Telkom Bandung.

[10] Cisco. Universal Small Cell 8000 Series Data Sheet.Cisco.http://www.cisco.com/c/en/us/products/collateral/wireless/universal-small-cell-8000-series/datasheet-c78-733945.html

[12] Oktaviani, 2009. Perkembangan Teknologi Komunikasi. Universitas Gunadarma

[13] Usman, Uke Kurniawan, Galuh Prihatmoko, dkk. 2012. “Fundamental Teknologi Seluler LTE (Long Term Evolution”. Penerbit : Rekayasa Sains, Bandung, Indonesia

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